# Improved Electrochemical Performance and Diffusion kinetics by Boron-doping in Na$\_{0.66}$Mn$\_{0.8}$Fe$\_{0.2}$O$\_{2}$ Layered Cathodes for Sodium-Ion Batteries

Source: [Improved Electrochemical Performance and Diffusion kinetics by Boron-doping in Na$\_{0.66}$Mn$\_{0.8}$Fe$\_{0.2}$O$\_{2}$ Layered Cathodes for Sodium-Ion Batteries](<https://www.sota2.com/research/paper/69f03f5d55a3c32af89fa3da>)

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Data updated: 2026-04-29T05:00:19.306Z

Authors: Jayashree Pati, P. Senthilkumar, Deepak Seth, Riya Gulati, Manish Kr. Singh, Madhav Sharma, Anita Dhaka, M. Ali Haider, Rajendra S. Dhaka

Published: 2026-04-27T16:43:25.000Z

## Abstract

We report the electrochemical investigation and study the diffusion kinetics of boron doped Na$\_{0.66}$Mn$\_{0.8}$Fe$\_{0.2}$O$\_{2}$ (B-NMFO) cathode materials for sodium-ion batteries. Notably, the B-NMFO cathode exhibits improved specific capacity of 163 mAh g$^{-1}$ as compared to 133 mAhg$^{-1}$ at 0.1~C for the NMFO cathode. Further, we observe better capacity retention of 70\\% for B-NMFO as compared to the NMFO (60\\%) at 1 C after 200 cycles, indicating high structural stability due to the presence of strong B-O bonds. The diffusion coefficient evaluation through galvanostatic intermittent titration technique and cyclic voltammetry, which is found to be in the range of 10$^{-8}$--10$^{-10}$ cm$^{2}$s$^{-1}$. Interestingly, the temperature dependent distribution of relaxation time (DRT) analysis provides a clear understanding about the individual physical processes occurring at different time domains during the electro-chemical testing. Moreover, density functional theory is employed to determine the energetics and the electronic properties of B-NMFO, which suggests that the interstitial tetrahedral sites, especially those next to vacancies, are the dominant incorporation path ways for B in the host structure. Additionally, classical molecular dynamics (MD) simulations are applied to gain insights into the Na-ion transport properties in the bulk structures cathode materials.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2604.24683>)

[PDF](<https://arxiv.org/pdf/2604.24683.pdf>)